Foot-Pounds to Joules (ft⋅lbf → J)
Formula
1 ft⋅lbf = 1.355818 JConversion Table
| ft⋅lbf | J |
|---|---|
| 0 | 0 |
| 1.0000 | 1.3558 |
| 2.0000 | 2.7116 |
| 3.0000 | 4.0675 |
| 4.0000 | 5.4233 |
| 5.0000 | 6.7791 |
| 6.0000 | 8.1349 |
| 7.0000 | 9.4907 |
| 8.0000 | 10.847 |
| 9.0000 | 12.202 |
| 10.000 | 13.558 |
| 11.000 | 14.914 |
| 12.000 | 16.270 |
| 13.000 | 17.626 |
| 14.000 | 18.981 |
| 15.000 | 20.337 |
| 16.000 | 21.693 |
| 17.000 | 23.049 |
| 18.000 | 24.405 |
| 19.000 | 25.761 |
| ft⋅lbf | J |
|---|---|
| 20.000 | 27.116 |
| 21.000 | 28.472 |
| 22.000 | 29.828 |
| 23.000 | 31.184 |
| 24.000 | 32.540 |
| 25.000 | 33.895 |
| 26.000 | 35.251 |
| 27.000 | 36.607 |
| 28.000 | 37.963 |
| 29.000 | 39.319 |
| 30.000 | 40.675 |
| 31.000 | 42.030 |
| 32.000 | 43.386 |
| 33.000 | 44.742 |
| 34.000 | 46.098 |
| 35.000 | 47.454 |
| 36.000 | 48.809 |
| 37.000 | 50.165 |
| 38.000 | 51.521 |
| 39.000 | 52.877 |
| ft⋅lbf | J |
|---|---|
| 40.000 | 54.233 |
| 41.000 | 55.589 |
| 42.000 | 56.944 |
| 43.000 | 58.300 |
| 44.000 | 59.656 |
| 45.000 | 61.012 |
| 46.000 | 62.368 |
| 47.000 | 63.723 |
| 48.000 | 65.079 |
| 49.000 | 66.435 |
| 50.000 | 67.791 |
| 51.000 | 69.147 |
| 52.000 | 70.503 |
| 53.000 | 71.858 |
| 54.000 | 73.214 |
| 55.000 | 74.570 |
| 56.000 | 75.926 |
| 57.000 | 77.282 |
| 58.000 | 78.637 |
| 59.000 | 79.993 |
| ft⋅lbf | J |
|---|---|
| 60.000 | 81.349 |
| 61.000 | 82.705 |
| 62.000 | 84.061 |
| 63.000 | 85.417 |
| 64.000 | 86.772 |
| 65.000 | 88.128 |
| 66.000 | 89.484 |
| 67.000 | 90.840 |
| 68.000 | 92.196 |
| 69.000 | 93.551 |
| 70.000 | 94.907 |
| 71.000 | 96.263 |
| 72.000 | 97.619 |
| 73.000 | 98.975 |
| 74.000 | 100.33 |
| 75.000 | 101.69 |
| 76.000 | 103.04 |
| 77.000 | 104.40 |
| 78.000 | 105.75 |
| 79.000 | 107.11 |
Foot-Pounds to Joules Conversion
Converting Foot-Pounds (ft⋅lbf) to Joules (J) is a common energy and power conversion. 1 ft⋅lbf equals 1.355818 J. For example, 100 ft⋅lbf is equal to 135.5818 J.
Quick Mental Math: Foot-Pounds to Joules
Multiply foot-pounds by 1.36 to convert to joules.
Why is converting Foot-Pounds to Joules tricky?
foot-pounds to joules mixes unit systems where neither feels natural.
Quick Reference Values
1 ft⋅lbf = 1.355818 J. 5 ft⋅lbf = 6.77909 J. 10 ft⋅lbf = 13.55818 J. 25 ft⋅lbf = 33.89545 J. 50 ft⋅lbf = 67.7909 J. 100 ft⋅lbf = 135.5818 J.
What is Foot-Pounds?
Foot-Pounds (ft⋅lbf) is a unit of energy and power. A foot-pound is a unit of work or energy equal to the work done by a force of one pound-force acting over a distance of one foot. It corresponds exactly to 1.355817948 joules in SI units. Foot-pounds are widely used in engineering and mechanics to quantify torque and energy [nist-cuu]. The foot-pound dates back to the British Imperial system, standardized in the 19th century for practical engineering calculations involving force and distance. It became a fundamental unit in mechanical engineering and remains common in US customary units [nist-cuu]. Foot-pounds are extensively used in the United States in mechanical engineering, automotive torque specifications, and energy measurement. They remain relevant in industries where imperial units dominate, although SI units are preferred internationally [nist-si-guide].
What is Joules?
Joules (J) is a unit of energy and power. The joule is the SI unit of energy defined as the work done when a force of one newton moves an object one meter in the direction of the force. It equals one kilogram meter squared per second squared (kg·m²/s²). This definition aligns with the International System of Units as standardized by the BIPM [bipm-si-brochure]. The joule is named after James Prescott Joule, a 19th-century physicist who studied energy conservation. It was officially adopted as a unit of energy by the CGPM in 1948 to unify energy measurement standards internationally [cgpm-resolutions]. Joules are used worldwide in physics, engineering, and electrical industries to quantify energy, work, and heat. Countries using the SI system, including those in Europe, Asia, and the Americas, rely on joules for scientific and industrial applications [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: foot pound, footpounds, foot pounds, joule, joul, jouls, juls. All of these refer to the Foot-Pounds to Joules conversion.